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EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Ka4 draw
3 Ka7 draw
4 Kb7 draw
5 Ra2 draw
6 Rb1 draw
7 Rb6 draw
8 Rb8 draw
9 Rf2 draw
10 K5b5 loss in 2 half-moves
11 K5b6 loss in 2 half-moves
12 K6b5 loss in 2 half-moves
13 K6b6 loss in 2 half-moves
14 Kb4 loss in 2 half-moves
15 Rb3 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rc2 loss in 2 half-moves
19 Rd2 loss in 2 half-moves
20 Re2 loss in 2 half-moves
21 Rg2 loss in 2 half-moves
22 Rh2 loss in 2 half-moves